app/src/main/java/com/example/geotracker/MainActivity.kt - master - AmuMax/GeoTracker

app/src/main/java/com/example/geotracker/MainActivity.kt
162 строки6 KB
Amumax
first_commit
24 ноя 2025, 10:33
24 ноя 2025, 10:3348321bd
package com.example.geotracker

import android.Manifest
import android.content.pm.PackageManager
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.rememberLauncherForActivityResult
import androidx.activity.compose.setContent
import androidx.activity.result.contract.ActivityResultContracts
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.DisposableEffect
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalLifecycleOwner
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.viewinterop.AndroidView
import androidx.core.app.ActivityCompat
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleEventObserver
import com.example.geotracker.ui.theme.GeoTrackerTheme
import com.google.android.gms.location.LocationServices
import com.yandex.mapkit.Animation
import com.yandex.mapkit.MapKitFactory
import com.yandex.mapkit.geometry.Point
import com.yandex.mapkit.map.CameraPosition
import com.yandex.mapkit.mapview.MapView

class MainActivity : ComponentActivity() {

    private val MAPKIT_API_KEY = "209ab81a-f438-41b5-833c-6de038332997"

    override fun onCreate(savedInstanceState: Bundle?) {
        MapKitFactory.setApiKey(MAPKIT_API_KEY)
        MapKitFactory.initialize(this)
        super.onCreate(savedInstanceState)

        val fusedLocationClient = LocationServices.getFusedLocationProviderClient(this)

        setContent {
            var location by remember { mutableStateOf<Pair<Double, Double>?>(null) }
            val context = LocalContext.current

            val requestPermissionLauncher = rememberLauncherForActivityResult(
                ActivityResultContracts.RequestPermission()
            ) { isGranted: Boolean ->
                if (isGranted) {
                    if (ActivityCompat.checkSelfPermission(
                            context,
                            Manifest.permission.ACCESS_FINE_LOCATION
                        ) == PackageManager.PERMISSION_GRANTED
                    ) {
                        fusedLocationClient.lastLocation.addOnSuccessListener { loc ->
                            if (loc != null) {
                                location = Pair(loc.latitude, loc.longitude)
                            }
                        }
                    }
                }
            }

            LaunchedEffect(Unit) {
                if (ActivityCompat.checkSelfPermission(
                        context,
                        Manifest.permission.ACCESS_FINE_LOCATION
                    ) != PackageManager.PERMISSION_GRANTED
                ) {
                    requestPermissionLauncher.launch(Manifest.permission.ACCESS_FINE_LOCATION)
                } else {
                    fusedLocationClient.lastLocation.addOnSuccessListener { loc ->
                        if (loc != null) {
                            location = Pair(loc.latitude, loc.longitude)
                        }
                    }
                }
            }

            GeoTrackerTheme {
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    Column(
                        modifier = Modifier.fillMaxSize()
                    ) {
                        Text(
                            text = location?.let { "Текущие координаты:\n${it.first}, ${it.second}" }
                                ?: "Ожидание координат...",
                            modifier = Modifier
                                .fillMaxWidth()
                                .padding(8.dp),
                            textAlign = TextAlign.Center
                        )
                        Box(
                            modifier = Modifier
                                .fillMaxWidth()
                                .weight(1f)
                        ) {
                            MapScreen(latitude = location?.first, longitude = location?.second)
                        }
                    }
                }
            }
        }
    }

    override fun onStart() {
        super.onStart()
        MapKitFactory.getInstance().onStart()
    }

    override fun onStop() {
        MapKitFactory.getInstance().onStop()
        super.onStop()
    }
}

@Composable
fun MapScreen(latitude: Double?, longitude: Double?) {
    val context = LocalContext.current
    val mapView = remember { MapView(context) }

    val lifecycle = LocalLifecycleOwner.current.lifecycle
    DisposableEffect(lifecycle, mapView) {
        val observer = LifecycleEventObserver { _, event ->
            when (event) {
                Lifecycle.Event.ON_START -> mapView.onStart()
                Lifecycle.Event.ON_STOP -> mapView.onStop()
                else -> {}
            }
        }
        lifecycle.addObserver(observer)
        onDispose {
            lifecycle.removeObserver(observer)
        }
    }

    AndroidView({ mapView }) { mapView ->
        if (latitude != null && longitude != null) {
            mapView.map.move(
                CameraPosition(Point(latitude, longitude), 16.0f, 0.0f, 0.0f),
                Animation(Animation.Type.SMOOTH, 1f),
                null
            )
            mapView.map.mapObjects.clear()
            mapView.map.mapObjects.addPlacemark(Point(latitude, longitude))
        }
    }
}